中国物理B ›› 2002, Vol. 11 ›› Issue (12): 1259-1266.doi: 10.1088/1009-1963/11/12/308

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Scattering of protons and antiprotons by hydrogen atoms

Reda S. Tantawi, A.S.Sabbah   

  1. Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt
  • 收稿日期:2002-05-20 修回日期:2002-07-08 出版日期:2002-12-12 发布日期:2005-06-12

Scattering of protons and antiprotons by hydrogen atoms

Reda S. Tantawi, A.S.Sabbah   

  1. Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt
  • Received:2002-05-20 Revised:2002-07-08 Online:2002-12-12 Published:2005-06-12

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摘要： The two-, four-, five- and fourteen-state approximations of the impact parameter method have been applied to the excitation of hydrogen atoms by proton (p) and antiproton (\overline p) impact. The effect of both channel and back couplings on the 2s and 2p excitations are investigated. The total cross sections are calculated for incident energies ranging from 1 to 2500 keV. It is found that the effect of both channel and back couplings on the antiproton-induced reactions is greater than on that induced by protons. We compare the results with those of other theoretical and experimental works.

Abstract: The two-, four-, five- and fourteen-state approximations of the impact parameter method have been applied to the excitation of hydrogen atoms by proton (p) and antiproton ($\overline{p}$) impact. The effect of both channel and back couplings on the 2s and 2p excitations are investigated. The total cross sections are calculated for incident energies ranging from 1 to 2500 keV. It is found that the effect of both channel and back couplings on the antiproton-induced reactions is greater than on that induced by protons. We compare the results with those of other theoretical and experimental works.

Key words: impact parameter method, excitation cross sections, back coupling, sign of the projectile charge

中图分类号:  (Electronic excitation and ionization of molecules)

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